Hi Everybody,

Can someone tell me how the vehicles are setup in XP12. Are vehicles setup by roadways such as, residential, primary, highway or are they setup by distance rings? Also, are there any limits to the amount of vehicles other than a loss of FPS?

#Set Car Density
SETTING_1 renopt_draw_3d_04 0 reno/draw_cars_05 0    cars/lod_min 0
SETTING_1 renopt_draw_3d_04 1 reno/draw_cars_05 2    cars/lod_min 0
SETTING_1 renopt_draw_3d_04 2 reno/draw_cars_05 2    cars/lod_min 0
SETTING_1 renopt_draw_3d_04 3 reno/draw_cars_05 3    cars/lod_min 0
SETTING_1 renopt_draw_3d_04 4 reno/draw_cars_05 4    cars/lod_min 0

Thanks

The network (.net) file (in Resources/default scenery/1000 roads) govers how many cars spawn per meter of road, see "CAR_DRAPED/GRADED" here: https://developer.x-plane.com/article/vector-network-net-file-format-specification/

The mix of cars is governed by the vehicle library.txt (default also in Resources/default scenery/1000 roads), which EXPORT_RATIO somewhat offering control over how often a given vehicle type spawns (compared to all vehicles). See: https://developer.x-plane.com/article/library-library-txt-file-format-specification/

 

If you want less cars in general, lower the value behind "reno/draw_cars_05" for your graphics slider setting (whichever slider in the UI controls renopt_draw_3d_04). Might also be done from DataRefTool. At least it was possible in XP11 (along with the draw distance for cars).

Hi,

It's the exact opposite, I was wondering if I could raise the cars count to 20,000 for a total of 100,000 per each computer for a total of 300,000 vehicles. Traffic Global keeps freezing XP12, so I have no AI aircraft, while I wait I wanted to blow out the cities with traffic.

SETTING_1 renopt_draw_3d_04 0 reno/draw_cars_05 0    cars/lod_min 20,000
SETTING_1 renopt_draw_3d_04 1 reno/draw_cars_05 2    cars/lod_min 20,000
SETTING_1 renopt_draw_3d_04 2 reno/draw_cars_05 2    cars/lod_min 20,000
SETTING_1 renopt_draw_3d_04 3 reno/draw_cars_05 3    cars/lod_min 20,000
SETTING_1 renopt_draw_3d_04 4 reno/draw_cars_05 4    cars/lod_min 20,000

Edited October 8, 2025Oct 8 by Mike_CFII_MEL

7 hours ago, Mike_CFII_MEL said:

I was wondering if I could raise the cars count to 20,000 for a total of 100,000 per each computer for a total of 300,000 vehicles.

I'm curious to know how that works out, 300,000 seems like a lot to me.

34 minutes ago, brinx said:

I'm curious to know how that works out, 300,000 seems like a lot to me.

Hi,

X-Plane wasn't giving me what I was asking for no matter the number I entered with the above settings. Only way I could really load up X-Plane 12 was with the following. I may settle on 30 to 50 thousand per computer.

SETTING_1 renopt_draw_3d_04 0 reno/draw_cars_05 0    cars/density_factor 5    cars/lod_min 20000
SETTING_1 renopt_draw_3d_04 1 reno/draw_cars_05 1    cars/density_factor 5    cars/lod_min 20000
SETTING_1 renopt_draw_3d_04 2 reno/draw_cars_05 2    cars/density_factor 5    cars/lod_min 20000
SETTING_1 renopt_draw_3d_04 3 reno/draw_cars_05 3    cars/density_factor 5    cars/lod_min 20000
SETTING_1 renopt_draw_3d_04 4 reno/draw_cars_05 4    cars/density_factor 5    cars/lod_min 20000

The Results - New Jersey Turnpike / Garden State Parkway loaded with Traffic as far as the eye can see, that's closer to real life.
https://drive.google.com/file/d/1FbIVxfWJBIA61EL7fwxOZ792QsKZN26g/view

Edited October 9, 2025Oct 9 by Mike_CFII_MEL

21 hours ago, Mike_CFII_MEL said:

It's the exact opposite, I was wondering if I could raise the cars count to 20,000 for a total of 100,000 per each computer for a total of 300,000 vehicles. Traffic Global keeps freezing XP12, so I have no AI aircraft, while I wait I wanted to blow out the cities with traffic.

Next to what you've found out, increasing the "cars per meter" paramater in the network file for a specific road type like highways has the advantage to not artificially congest other road types.

1 hour ago, Bjoern said:

Next to what you've found out, increasing the "cars per meter" paramater in the network file for a specific road type like highways has the advantage to not artificially congest other road types.

Hi,

I now have the vehicles set to 30,000 per computer, it really fills up the roadways.... and in a heavy hitting area like Newark New Jersey I get no stutters introducing all these cars into the mix.